Benthic-Optimised Marine Environment Classification (BOMEC) for New Zealand waters
Distributional data for eight taxonomic groups (asteroids, bryozoans, benthic foraminiferans, octocorals, polychaetes, matrix-forming scleractinian corals, sponges, and benthic fish) have been used to train an environmental classification for those parts of New Zealand's 200 n. mile Exclusive Economic Zone (EEZ) with depths of 3000 m or less.
A variety of environmental variables were used as input to this process, including estimates of depth, temperature, salinity, sea surface temperature gradient, surface water productivity, suspended sediments, tidal currents, and seafloor sediments and slope. These variables were transformed using results averaged across eight Generalised Dissimilarity Modelling analyses that indicate relationships between species turnover and environment for each species group. The matrix of transformed variables was then classified using k-medoids clustering to identify an initial set of 300 groups, with relationships between these groups then described using agglomerative hierarchical clustering.
Groups at a fifteen group level of classification appropriate for use at a whole-of-EEZ scale are described; the classification can also be used at other levels of detail, for example when higher levels of classification detail are required to discriminate variation within study areas of more limited extent.
Although not formally tested in this analysis, we expect the analytical process used here to increase the biological discrimination of the environmental classification. That is, the resulting environmental groups are more likely to have similar biological characteristics than when the input environmental variables are selected, weighted, and perhaps transformed using qualitative methods.
The input environmental data were on a 1 km x1 km grid and the 15-group classification output exists as an ESRI shapefile.
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Citation proposal
Ashley Rowden (NIWA National Institute of Water and Atmospheric Research Ltd). . https://dc.niwa.co.nz:/niwa_dc/srv/api/records/5a552e3a-05d3-55fe-20dd-4cb29a1dd323 |
- Identification
- Content
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- Lineage
- Spatial rep.
- Ref. system
- Acquisition info
- Metadata
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- Md. constraints
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- Schema info
Identification
Data identification
Citation
- Date ( Publication )
- 2012-02-01T21:21:00
- Date ( Publication )
- 2012-02-01T21:21:00
- Purpose
- To generate a marine environment classification with relevance to the benthic environment within New Zealand waters
- Credit
- Project was completed by NIWA for the then Ministry of Fisheries (now Ministry for Primary Industries - MPI).
- Status
- Completed
Point of contact
Author
- Spatial representation type
- Vector
- Topic category
-
- Environment
Extent
- Description
- New Zealand EEZ in depths of < 3000 m.
coordinates
No information provided.
N
S
E
W
- TimePeriod
- 2008-07-01T00:00:002009-06-30T00:00:00
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- marine environment classification, BOMEC
- NIWA Project Codes
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- BEN200601
Legal constraints
- Use limitation
- See the link to the published report for a description of the input data and analysis.
- Other constraints
- Contact the Research Data Manager at Ministry for Primary Industries (MPI) for permission and access. [email protected]
Security constraints
- Use limitation
- Use of data and final output requires permission of Research Data Manager at MPI. [email protected]
- Classification
- Confidential
Associated resource
- Title
- Leathwick, J.R.; Rowden, A.; Nodder, S.; Gorman, R. ; Bardsley, S.; Pinkerton, M.; Baird, S.J.; Hadfield, M.; Currie, K.; Goh, A. (2012). A Benthic-optimised Marine Environment Classification (BOMEC) for New Zealand waters. New Zealand Aquatic Environment and Biodiversity Report No. 88. 54 p.
- Association Type
- Larger work citation
Locale
- Language
- English
Character encoding
No information provided.
Distribution
Digital transfer options
- OnLine resource
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BOMEC report
Publication describing objective, input data, analyses, and results.
Lineage
Lineage
- Statement
- See the link to the published report for a description of the input data and analysis.
Scope
- Hierarchy level
- Dataset
- Dataset
- BOMEC shapefile
Ref. system
Reference system
No information provided.
- Reference system identifier
- OGP / urn:ogc:def:crs:EPSG::4326
- Reference system identifier
- NZST/NZDT
Metadata
mdb:MD_Metadata
- Metadata identifier
- 5a552e3a-05d3-55fe-20dd-4cb29a1dd323
Locale
- Language
- English
- Character encoding
- UTF8
Point of contact
NIWA National Institute of Water and Atmospheric Research
301 Evans Bay Parade
Hataitai
Wellington
6021
New Zealand
Hierarchy level
- Resource scope
- Dataset
Text
No information provided.
- Date info ( Creation )
- 2015-02-13T11:13:16
- Title
- ISO 19115-3
Md. constraints
Security constraints
Text
No information provided.
- Classification
- Unclassified
Overviews
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5a552e3a-05d3-55fe-20dd-4cb29a1dd323
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Read here the full details and access to the data.
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NIWA - Metadata Catalogue